Join the Live@ crew and NASA scientists as we delve into the ancient knowledge of the Chacoans, daily sky watchers who amassed a great knowledge about the movements of the sun. And learn why today's astronomers and solar physicists continue to watch the sun, using modern ground-based observatories and orbiting space telescopes.

Chaco Canyon is a shallow, ten-mile canyon situated in the northwest corner of New Mexico. Seventy miles from the nearest town and accessible only by washboard dirt roads, it's remote by today's standards. The canyon itself has been carved from ancient sea beds by centuries of erosion. Millions of years of history reveal themselves in the layers of rock and the fossils embedded therein.
Chaco Canyon, among other things, continues to be of great interest to those who study ancient cultures, including archeoastronomers. Evidence suggests that the Chacoans were expert skywatchers, with a clear knowledge of the cyclic and seasonal patterns of the sun, moon, and stars
Join the Exploratorium in this on-line investigation about this fascinating, ancient site.

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Webcasts made possible through the generosity of the Gordon and Betty Moore Foundation, the Jim Clark Endowment for Internet Education, the McBean Family Foundation.

Bandwidth and infrastructure support for connectivity to the California Research and Education Network and to other Internet2-connected networks provided by the Corporation for Educational Networks Initiatives in California (CENIC).